Question 1209242
<font color=black size=3>
-2x+y = -15
2x+3y = -15


Add straight down
The x terms go away since they add to 0x or simply 0.
The y terms add to 4y
The right hand sides add to -30


4y = -30 leads to y = -30/4 = -15/2 = -7.5


Then use this value of y in either equation to find x.
-2x+y = -15
-2x-7.5 = -15
-2x = -15+7.5
-2x = -7.5
x = -7.5/(-2)
x = 3.75
x = 3 + (3/4)
x = (12/4) + (3/4)
x = (12+3)/4
x = 15/4


When stating the solution in fraction form it would be (x,y) = (15/4, -15/2)


The decimal equivalent is (x,y) = (3.75, -7.5)
Each decimal value is exact and hasn't been rounded.


I'll let the student verify this solution.
</font>